<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <link rel="stylesheet" href="public/css/ing.css">
    <title>公转</title>
</head>
<body>
    <div class="big">
        <div id="sun"></div>
        <div class="small">
            <div id="earth"></div>
            <div id="moon"></div>
        </div>
    </div>
</body>
</html>